Agenda item 33: Economic development of under-developed countries (A/5532) : (b) Activities of the United Nations in the field of industrial development : report of the Economic and Social CounciI (E/3781, annex VIII; A/5503, chap. IV; A/5534 and Add.1 and 2, A/5535 and Add.1-5 and Add.5/Corr.1; A/C.2/221, A/C.2/L.740 and Add.1 and 2); (a) PIanning for economic development : report of the Secretary-General (A/5533/Rev.1, A/C.2/L.744 and Add.1-4); (c) Decentralization of the economic and social activities of the United Nations and strengthening of the regional economic commissions (E/3786, E/3798, A/5584, A/C.2/L.742/Rev.1).